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File:Geissler tubes.jpg

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English: Color drawing of Geissler tubes lit by their own light, from an 1869 French natural philosophy book, showing some of the many fanciful shapes and colors. They were powered by high voltage from an induction coil. Invented by German glassblower Heinrich Geissler in 1857, Geissler tubes were the first gas discharge tubes and were manufactured for entertainment. Around 1910 they evolved into the first neon lights. Caption: "Electric discharge in rarefied gasses: 1.Discharge in Vapor of Alcohol. (2.3.4.5.Geissler's tubes enclosing rarefied gasses) 2.Shows Fluorescence of Sulphuret of Calcium, 4.Fluorescence of Uranium glass, 5.Shows Fluorescence of Sulphuret of Strontium, 6.Fluorescence of Uranium glass and Sulphate of Quinine".
Date published in Augustin Privat Deschanel (1869) Traité Élémentaire de Physique, Librairie L. Hachette et Cie., Paris, p. 569
Source Downloaded 2008-12-30 from Augustin Privat Deschanel, Joseph David Everett (1896) Elementary Treatise on Natural Philosophy, Part 3: Electricity and Magnetism, 13th Ed., D. Appleton & Co., New York, p.2, Plate 2, translated from Privat Deschanel's 1869 Traité Élémentaire de Physique by Joseph David Everett on Google Book. Image credited in caption to 'M. Rapine'.
Author M. Rapine
Permission
(Reusing this file)		 Public Domain in USA: Published in USA prior to 1923


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Date/TimeThumbnailDimensionsUserComment
current04:32, 18 January 2009Thumbnail for version as of 04:32, 18 January 20091,262 × 810 (225 KB)Chetvorno= Summary == {{Information |Description={{en|Color drawing of Geissler tubes from an 1869 French natural philosophy book. Caption: "ELECTRIC DISCHARGE IN RAREFIED GASSES. 1.Discharge in Vapor of Alcohol. (2.3.4.5.Geissler's tub
01:21, 31 December 2008Thumbnail for version as of 01:21, 31 December 20081,273 × 815 (284 KB)Chetvorno{{Information |Description={{en|Color drawing of Wikipedia:Geissler tubes from an 1869 French natural philosophy book. |Source=Downloaded 2008-12-30 from [[http://books.google.com/books?id=AbYLAAAAYAAJ&pg=PA568 Augustin Privat-Deschanel (186

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